Dental bridge investment support



May 10, 1932. w. c. GOSSE DENTAL BRIDGE INVESTMENT SUPPORT Filed June15, 1931 INVENTOR.

M/I'LLIAM C. Gas-5E.

ATTORNEYS.

Patented May 10, 1932 r UN'ATTED isms Q ow infirm cLGoss orrimnciscoicimnoiimn Q, f

' Barnes investm nt Application filed Julie is,

My invention relates to improvements in dental bridge investmentsupports and. .it consists of the combinations, constructions andarrangements hereinafter described and claimed.

An object of my invention is to provide a dental-bridge investmentsupport which will hold the investment from breaking down '1 during useand which will permit a less-v loamount of investment to'be used. Thesup-f port ismadeup of sections so that difierent partsv of it can beused for retaining smaller; bridges. .The support is also perforated toV permitthe readydrying of the investment. The parts are'adjustable foraccommodating bridges of different sizes and the flangesdisposed at thetop and bottom ofthe supportf are made large enough to support theinvestment without interfering with the soldering I l r r i i 1ez'cceptlone is a rightandthe other is aleft;

bfthebridge; 1 t I i.

A further object of: my invention is-to provide a device of the type.describedwhi'ch-is, .1 extremely. simple in construction, and which;

efficient for thespurpose. ins-.1 a a 'theZweb3.

'is durable and tended, r. t M Other objects and advantages will appearin-the following specification, and the novel features ,of. the:device-will be particularly pointed out in the appended claims. a 10 Myinvention is illustrated in the accompanying drawings forming a part Of'lBl'llSi application, in which Figure 1 is a top plan view of thesupport; n Figure 2 is a front elevation; Figure 3 is a section alongthe line 33 of Figure 1; and

Figure 4 is a section alon Figure 1. V g In making a bridge it is firstnecessary to crown the teeth which are to be used for supporting thebridge. The bridge may be supported from abutments other than crowns,such as from inlays and Carmichael crowns: The patient then bites into apiece of plaster of Paris and'wh en this is removed the abutments areremoved with it. Artificial teeth are now formed and are set in theirproper places and are secured to each other by wax. I The plaster ofParis is now removed from the bridge and the dentist is ready to make gthe line 4. 4 of of mayibe readily understood.

' 'now apbliedto theiinterior' of th B and C, and the bridge is forced1e31, s r ia1n ;544, 554.1 J

use of myifnvention." The investment support to be presently describedhas investment; spread therein'andthenthe bridge is forced down intothe'investment and as the invest-. ment sets'that portionof theinvestment ad-' 'jacent tothe wax is removed. Before proceeding furtherwith the method I of forming the bridge I" will describe the par--"ticular type of investment sup'p c'ntiiand CD The. part B forms thefront-ofkthe investment supportandit has-a top flange greater insizethanthe bottom flange'2 '(see Figure 3) The flanges areseparated' from eachother by a web 1 3 -whichyis perforated as at l (see F' g'ure'2).Thecentral'part,B, -j

This-support consists of three parts',iA B,

is curved and. is d'esignedtd receive-the'in vestment for supporting ithe anterior teeth? 1 The side members- A and C are identical" andeachhas a narrow'flange 5' at its top and awidefiange 16' at its base.separating the flanges is -"per'forated as" at 8 (see -Figure2). Thiswall abuts-the edge of Each part A iand' has legs 9 that' sa addlethecenter part B andhav e'hooks -10;for* Y reinovably receiving I Ifastening screws: 5 11; L

' The hooks are so fashioned that the sides "Af j and C can be swungangularly through small arcs for'zaccomm'odating-bridges of different 7sizes. 'After the sides A'and Ghave been ad juste'd'thes'erews :ILmaybetightened.-' From the foregoing'dscription oflthe'various partsofithe-device,*the operation there- "I have already described how the bmentsrby means of waxls The. investment is the investment so thatthecuspsjof the posterior teeth-face toward 'the wide flanges 6.The-anterior teeth have beenpositioned ;di-. 5

, rectly above the'inner edgefiof the'ifiange ,11

cing the bridge into the I at'the moment'oflfor investment and-thenvtheoperator, while in theact: of inserting the'bridgein the invest ment;moves' -the' bridgefforwardly a slight w W ridgesr formed, iup-tothewpointwwheretheartificialf teeth are'heldlto eac-h other and'to theabut I eiparts-A, down into distance with respect to the support, sothat the bridge will assume the position shown in Figure 3.

After the investment hardens portions of it are removed so as to exposethe interior surface of the bridge and-to further expose all of the.wax. portions that connect the teeth together; Gare-mustbe taken in'otto place any of the teeth in the bridge next to any vice 'wh'iclfi will(30.:

ports the arts of the metal holder; In order to get the correct adjustment 'of 'thesupport prior to placing the bridge in position, thesides A and C are swung so thatthenarrow'flanges 5 just clear each sideof the. brid e widest point of the bridge.

thefirstcto enter .theinvestment.-. After the surplus-investmentds cutawaysoaasetoexpose the wax on-theinside, this.

wax is boiled outtwith boiling-Water." The. support. or case, is..-nowplaced .over a; low flame and .the'investment; is gradually heated.

until it is thoroughly: dry.

The device isnowremoved to the solderitgis removeddromitheholder'orcase.

fitted .into the patienfis mouth..-

The; investment-slopes-away from the inner surfacescof. the. teeth :soas -=to: expose all of..the-..portions.- to :bee soldered: The-inner:edges;.of:the flanges :1, .2, 5 and 6: terminate.

, flush; with-.-therinvestmentsozthat they-.will

not interfere: with the torch when used in solder into place. For thisflowing the gold reason the flange 2 isof less width thanl the flange; 1and the; flanges 5 of: lessaw-idth; than the flanges 6.IPha-Ve'indicated in Figure: 3,

by: the reference .nnmer al 125tl1e1'Wa'Xr1WhiCh holdsradjacentteethtogether; 1 This wax; of.

course, is. boiled out and gold. solder; takes :its

place -i and the purpose of the, investment is: 1 to hold. the; teeth 1in aproper; position F while;

receivinggthergoldsolders.

The? flange'rfi ;is made wide-because itsup investment- .13,awhic'lrzin'zturn supports -the occlusal? surfaces ofzthe 1 posteriorteethil laa.

teeth:

The support :orzcase provides a scompactrde= at the. The %ridge in beinginsertedrin the investmentzisheld so r thatihe bitingsurfaoesofthebridge will be mg 1 block; and. gold solder is applied withthe-.aidiof a2 blew-v tor'ch so. that: this solder will flow into thespaces .forme'rlyoccupied bythenwaxQ Thegold solder: quickly sets-and.

. thebrid'ge: is now' allowed'to cool, after Will-lib bridge; is thentrimmed and; polished and.

The {posterior I teetlihavea'theirrim i nerirsurfacesi'cutiaway? at". anangleand the"- flange: 5;: is maden-smallz enouglr. so. asnotito"interrereiwith the .gingival portionsiofi'these,

permit a. small; quantity of investment; to: bei-u'sed and 'which willikeep thiscinvestmentaintact and. the case .-may' be:

. moved rea-dilyrinto any position": for; solder in'gWhensthe-three-parts'A, B, andzG of:

' the device are used an entire bridge; maybe:v 9. supported.IfsmalIer-bridges aretoxbe sup-'- ported one or more of the parts may beused. Although I have shown and described one embodiment of my inventionit is to be understood that the same is susceptible of various changesand I reserve the right to employ such changes as may come within thescope of the claims hereto annexed.

I claim: r 1. A dental bridge investment support comprising a centralcurved perforated memb'er having-inwardly extending flanges at its inthe central member for receiving: the;

hooks, .saidt, screws when .tightened' locking; the side-1 members. .tothe; central one.

311A" dental. bridge. investment-:"support'. comprising aicentralcurvedptort'ion and side hinged ifportions, all .of said portions 1having inwardly extending flanges:

45A. dental bridge investment support 3 comprising a .central rcurvedportiongand side hinged portions, all of saidportions having inwardlyextending: flanges,-.said: flanges being :disposed at th e top andbottom" of the portions, the. top: flangeof ithe centerrporti on vandthe bottom flanges: of the side .portions.m

being greater than the opposing flanges-car ried'by the same portions;

5. dental bridge investment support: comprising a, central P curvedportion and side= hinged portions, all ofsaid; portions being perforated1 and having inwardly extending flanges.

WILEIAM eo'ssn;

